Pioneer HPM-150 after full restoration and upgrade

Pioneer HPM-150 Restoration and upgrade

Pioneer HPM-150 Restoration and upgrade

Pioneer HPM-150 Restoration and upgrade

  • Pioneer HPM-150 Restoration – Part 1: Disassembly
  • Pioneer HPM-150 Restoration – Part 2: Crossover
  • Pioneer HPM-150 after full restoration and upgrade
     
     
    Pioneer HPM-150 after full restoration and upgrade

    Restoration bucket list:

    – refoamed woofers
    – super tweeters taken apart and cleaned

    – new silver plated copper internal wiring
    – new high end banana posts
    – new crossovers with Jantzen Cross Coil Inductor and Clarity cap capacitors all with 2% tolerance, Resistor – MOX 1% tolerance
    – deox potentiometers
    – added internal sound dampening

    – cabinets sanded,
    – front and top sprayed with matt black
    – high gloss finish of walnut veneer: 3 layers of high gloss acrylic with 2 more layers of high gloss yacht varnish on top of it.
    – back side of speaker re-sprayed brown high gloss
    – set of extra castor wheels

    Finished cabinets
    Pioneer HPM-150 Restoration and upgrade

    Ready for black matt paint
    Pioneer HPM-150 restoration

    Spraying
    Pioneer HPM-150 restoration

    After front and top sprayed with matt black
    Pioneer HPM-150 restoration

    before and after
    Pioneer HPM-150

    back side of speaker re-sprayed brown high gloss
    Pioneer HPM-150

    Sanding before first layer of yacht varnish
    Pioneer HPM-150

    First layer of yacht varnish
    Pioneer HPM-150

    Removing super tweeter transformers from original crossovers
    Pioneer HPM-150 crossover

    Drawing of new crossovers
    Pioneer HPM-150 crossover

    Position plan of new crossovers with components
    Pioneer HPM-150 crossover

    Assembled new crossovers
    Pioneer HPM-150 crossover

    Pioneer HPM-150 back panel with banana speaker posts
    Pioneer HPM-150 banana speaker posts

    Pioneer HPM-150 back panel with soldered speaker posts
    Pioneer HPM-150 banana speaker posts
     
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  • 13 thoughts on “Pioneer HPM-150 after full restoration and upgrade

    1. Hello,
      Excellent work, congratulations !!
      Why you replace the original crossover ??..Whats the design you used as upgrade ???
      Thanks in advance

      • Hello there,
        I’ve replaced a crossover because it was low quality and bad design. I used a very same schematic with high grade components and better mechanical and spacial design to limit cross interference of coils. Please follow YouTube channel I will post a new video shortly where I explain some aspect of my decision.

    2. Pingback: Pioneer HPM-150 Restoration – Part 1: Disassembly | Audio Tweak

    3. Pingback: Pioneer HPM-150 Restoration – Part 2: Crossover | Audio Tweak

    4. Pingback: Pioneer HPM-150 Restoration – Part 3: Cabinet restoration & Final assembly | Audio Tweak

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